NEW YORK, April 30 – Beckman Coulter’s first quarter revenues slipped 0.4 percent to $432.7 million, compared with $434.4 million a year ago, due to unfavorable exchange rates.

On a constant currency basis, sales rose 6.5 percent, said the Fullerton, Calif.-based maker of automation systems for the life sciences, adding that demand for its systems remained strong.